This is again a tough one to decide and I currently don't have access to either of these models to try them out in a store. I would like to hear from members who have tried both these and how they compare - I'm still trying to get more information from the web (have already read reviews in some sites and comments on Amazon.com). What I've gathered so far: * the UEs are probably better because they have two drivers (as opposed to one in Shure E4C) * the UEs also deliver higher bass and thus compromise on the higher frequency ranges (some comments about the E4C say just the opposite - that the E4C does bass poorly and the high frequencies come out quite high) I don't have much related information about Shure E4C. Apart from the quality of sound, I'm also looking at the overall build and comfort in using them (the other "value for money" aspects). While I hunt for more comparisons and reviews, it'd help me tremendously if you could throw in your opinions based on experience. Both these models fall in the same price range, and since they're relatively "expensive", I would prefer to put my money in something I'd feel happy about for years. Or should I ditch these models and have a better look at Etymotic ER-4? Thanks for your time!